/*
 * Copyright 2016-2018 Leon Chen
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.moilioncircle.examples.sentinel.impl;

import java.io.Closeable;
import java.io.IOException;

/**
 * @author Leon Chen
 * @since 3.1.1
 */
public interface Sentinel extends Closeable {

    void open() throws IOException;

    void close() throws IOException;

    boolean addSentinelListener(SentinelListener listener);

    boolean removeSentinelListener(SentinelListener listener);
}
